Type-bar ball bearing



Sept. 16, 1924.

G. AICHELE TYPE BAR BALL BEARING Jaye/Mar: j W

Filed Jan. 23

Patented Sept. 16, 1,924.

UNIT ED ST T s ear r caries...

TYPE-BAR BALL BEARING.

Application filed January 23, 1924. Serial No. 687,902.

To all why/n it may] concern:-

Be it known that I, GoTrLoB AICHELE, a citizen of the State ofWurttemberg, Germany, residing at Nellingen, near Esslingen,

Wurttemberg, Germany, Kaiserstrasse 2,

have invented certain new and useful Improvements in Type-Bar BallBearings, of

which the following is a specification.

This invention relates to type-bars of the kind in which a ball-bearingsupporting the bar is carried by the prongs of a member encompassing thesupported end of the respective type-bar. My improvement in thesetype-bar supporting means consists in arranging the balls within thetype-bar body, and the ball-supporting members in said prongs in such amanner that their outer faces project over the respective surfaces ofthe said prongs either not at all or only to a substantiallyinappreciable extent.

My invention is illustrated by way of example, in the accompanyingdrawing in which Figure 1 is a section of one of the improvedarrangements and combination of parts, the lower part of theprong-forming member being shown in side-view. Figure 2 is a similarillustration showing a modification, and Figure 3 shows anothermodification.

The member'a is the supporting member for the ball-bearing, andterminates in two prongs I) and 0, between which the type bar (Z issupported on the balls 6; the latter are supported in their turn by twoco-axial conical members, of which one is attached to one prong, and theother to the other prong. At its inner end the type-bar is formed withan annulus adapted to receive the balls 6.

V In the example shown in Figure 1, the inner race consists of theconical members 9 and h, of which 9 is provided with a threaded pivot orcentral projection g onto which the member h is screwed. The pivot 9passes through a hole of the prong c and exter'iorly of the latter isprovided with a nut-disk h,

by which the conical membersg and h forming the inner race are held inplace. 'The outer race is formed by the appropriately shaped lower endof the type-bar d.

The modification illustrated in Figure 2 includes a male conical member2' and a female conical member is which is threaded upon its outerperiphery and is screwed into a suitably large and threaded aperture ofthe prong b; a threaded central projection 2' of the member 11 isscrewed into a correspondingly threaded central bore of the member 70.In addition a threaded pin Z securedto a thin disk Z is screwed into athreaded bore of the male race member 2', i. The diameter of the disk Zis a little larger than the diameter of the male member 70 so that thislatter is held securely in place in the prong b. In all other respectsthe arrangement is practically the same as in Figure l.

In Figure 3 two concavo-convex inner race members on and n are screwedrespectively into the prongs b, a; a screw 0 extends through both innerrace members for the accommodation of a nut go to hold these partstogether.

-The supporting members a with their prongs b and 0, and the bars d withthe balls 0, for which they form the outer race are the same in allfigures. A speciaPadvantage of the new arrangement and combination ofparts consists'therein that the ball-bearing, or its races respectively,is, or are, effectively protected against the admission of dust. Acharacteristic feature resides also in the fact that the outer faces ofthe conical mem bers forming the inner race project over the outer orlateral faces of the prongs b and 0 either not at allor only'to aninappreciable extent. For instance in Figure 1 only the free end of thepivot 9 projects very little 1 beyond the outer face of the prong c, andin Figure 2 only the thin disk Z projects slightly over the face of theprong Z); in Figure 3 no portion of the ball race members or theirassociated elements project be yond said prongs.

I claim: r

A combined ball-bearing and type-bar for typewriting machines,comprising, in combination, a type-bar provided at its supporting endwith an annulus constituting the outer race for the balls of theball-bearings; a forked member, the prongs of which embrace said annulusand are each provided with an aperture, two conical members 10- cated insaid aperture and forming at their In testimony whereof I afllx mysignature adgacent sldes the lnner race, and a, screw m the presence oftwo wltnesses threaded pr0 ect10n compnslng an lntegral part of one ofsaid. conical members and pro GOTTLOB AIGHELE. jecting axially into theother conical mem- Witnesses: her for detachably securing said membersH. UEBELE,

together. v A. LEMNITZER, Jr.

